Would it be advisable to settle on a bevel angle of 45 degrees for roughing gouges and parting tools thereby avoiding the spacer block method? I assume that the TTS-100 turning tool setter would continue to function for these tools even as the grinding wheel wears.😕
I assume that you are asking about bowl gouges rather than a spindle roughing gouge since the TTS-100 only works with bowl gouges and spindle gouges that fit in the SVD-185. The TTS-100 can also be used with skews, but I have never used mine for that purpose since I have my own preferred skew settings. It does not work with setting the angle on parting tools unless the tool has changed recently.
I have the tool and I use it for setting the grind on some of my gouges. You don't have to use 45° -- it also has a setting for 55°, the difference being whether you set the SVD-185 gouge jig at "2" or "4". As far as the TTS-100 tool is concerned, it automatically compensates for wear on the grinding wheel.
I have a tip for making it easier to use the TTS-100: When the tool is new, the two aluminum "wheels" are fairly tight and don't turn easily and also being bright polished aluminum, it is hard to tell when they are rotating. To take care of that, I do two things. First, I remove the two aluminum wheels and then using a tiny bit of Johnson's Paste Wax on a paper towel, I lubricate the plastic tool where the wheels snap in and I also lube the "axle" of the aluminum wheels. Let dry and then buff with a clean paper towel and then snap the wheels back onto the tool. Next, to more easily see when the wheels rotate, I use a sharpie to put a black line on each of the wheels. See the attached photo.
BTW, this should go without saying, but I will say it anyway, you slowly rotate the grind stone by hand when setting the bar position using the TTS-100 -- never try it with the stone running under power, else you may find yourself in the market for a new TTS-100.